Light Bleeding - Light Propogation


I’m getting a light bleed issue on my environment. I had a similar issue before with my walls and I manged to fix them by increasing the thickness of my walls and tweaking the shadow bias. Unfortunetly, i can’t increase the thickness on the gun or the “paper” (flat planes).

Is there a way around this?

Thanks, any help would be appreciated.

Close, because of duplication: